Three (1969)

Best friends Bert and Taylor, who are twenty-something American college students, are spending their summer driving around Italy and France in an older model Puegeot purchased in Italy, before heading back to the States in September for school. Taylor is the straight-laced, reliable one, who admits that he has problems expressing his feelings, especially to women, while Bert is the smooth talking player. They only have a general idea of where they will go and what they will do, but hoping that they can have some casual female companionship at their various stops. In Florence, they do one better when Taylor meets Marty, a ex-pat Brit living in Paris, he who believes she is a kindred spirit. As such, he suggests to Bert that they ask her along on the remainder of their trip, she to pay her fair share, and if things don't work out that they will part company with no hard feelings. Although both Taylor and Bert think she attractive, they also make a pact not to complicate the situation by getting into a romantic and/or sexual situation with her. Marty agrees with the plan. But as the three spend more and more time together before the summer ends, each will have to decide what their time together really means, and if the no sex pact is broken, what that will do to the situation in the present and to the "best friend" friendship between Bert and Taylor in the future.